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ORIGINAL RESEARCH article

Front. Energy Res.
Sec. Sustainable Energy Systems
Volume 12 - 2024 | doi: 10.3389/fenrg.2024.1498514

Design and implementation of a PV-tied effective inverter with high reliability and low THD for distribution-grid applications

Provisionally accepted
Shaik Nyamathulla Shaik Nyamathulla Dhanamjayulu C Dhanamjayulu C *
  • VIT University, Vellore, India

The final, formatted version of the article will be published soon.

    Researchers have focused on multilevel inverters (MLIs) due to their use in electric vehicles, renewable energy systems, and industrial applications. This paper proposes a new design for a single-phase 21-level asymmetrical MLI for photovoltaic (PV) applications that reduces the number of components, voltage stress, overall size and cost. An enhanced incremental maximum power point tracking (EINC-MPPT) is used in the PV standalone system to offer a fast dynamic response, track maximum power and regulate the PV module output voltage. This paper presents the PV boost DC-DC single-input multi-output (SIMO) converter linked to the solar panels to provide the supply voltages for the inverter. A level-shifted constant multicarrier sinusoidal pulse width modulation (LSCMSPWM) technique is used to produce the better-synthesized output waveform from the MLI, resulting in low total harmonic distortion (THD) also meeting IEEE standards. The suggested MLI is simulated in MATLAB/Simulink and tested with a hardware prototype under various load conditions. The proposed MLI is suitable for medium-power and grid-connected renewable energy systems applications. The qualitative and quantitative parameters of the proposed MLI have been evaluated using parameters such as cost function (CF), number of components, reliability, THD, total standing voltage (TSV) and these parameters are compared with the existing MLIs.

    Keywords: cost function (CF), Level-Shifted Constant Multicarrier Sinusoidal Pulse Width Modulation (LSCMSPWM), Multilevel inverter (MLI), PV boost SIMO converter, Total harmonic distortion (THD), total standing voltage (TSV)

    Received: 19 Sep 2024; Accepted: 30 Oct 2024.

    Copyright: © 2024 Nyamathulla and C. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Dhanamjayulu C, VIT University, Vellore, India

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.